Let $M = (X, \mathcal{F}, \mu)$ be a D1158: Measure space such that

(i)	$f : X \to [0, \infty]$ is an D5610: Unsigned basic Borel function on $M$

Then \begin{equation} f \overset{a.e.}{=} 0 \quad \iff \quad \mu(f) = 0 \end{equation}